If , then .
Hope this helps.
Answer:
7
Explanation:
We solve for x first.
So: 4x - 7 = 2x
Subtract 2x from both sides: 4x - 2x - 7 = 2x - 2x
2x - 7 = 0
Add 7 to both sides: 2x - 7 + 7 = 0 + 7
2x = 7
Divide by 2: =
x =
Now, we substitute x for like this:
2 ( ) = 7
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